function y= o( x )
x1 = 0;	
y = zeros(size(x))

for i = 1: length(o1)
	o1 = x(i);
if (o1 >=0 && o1 <= 2 )
	y(i) = 0.28 + (0.04 * o1) + (-0.04 * x1);
else
	y(i) =  0.28 + (0.04 * x1) + (-0.04 * o1);
endif
endfor
endfunction		


